summaryrefslogtreecommitdiffstats
path: root/arch/mips/include/asm/mach-loongson/loongson.h
diff options
context:
space:
mode:
authorWu Zhangjin <wuzhangjin@gmail.com>2009-11-17 01:32:59 +0800
committerRalf Baechle <ralf@linux-mips.org>2009-12-17 01:57:20 +0000
commitf8ede0f700f5478851f242f291d203cde54ca6cf (patch)
tree37fba17288bcd12468c454eb6c585d72fb6f9770 /arch/mips/include/asm/mach-loongson/loongson.h
parent9726b43a4d7aaa5b30f559e78768aeb3d17bc224 (diff)
downloadop-kernel-dev-f8ede0f700f5478851f242f291d203cde54ca6cf.zip
op-kernel-dev-f8ede0f700f5478851f242f291d203cde54ca6cf.tar.gz
MIPS: Loongson 2F: Add CPU frequency scaling support
Loongson 2F supports CPU clock scaling. When put it into wait mode by setting the frequency as ZERO it will stay in this mode until an external interrupt wakes the CPU again. To enable clock scaling support, an external timer of a known stable rate is required. Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com> Cc: linux-mips@linux-mips.org Cc: cpufreq@vger.kernel.org, Cc: Dave Jones <davej@redhat.com>, Cc: Dominik Brodowski <linux@dominikbrodowski.net>, Cc: yanh@lemote.com Cc: huhb@lemote.com, Patchwork: http://patchwork.linux-mips.org/patch/660/ Patchwork: http://patchwork.linux-mips.org/patch/751/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/include/asm/mach-loongson/loongson.h')
-rw-r--r--arch/mips/include/asm/mach-loongson/loongson.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/mips/include/asm/mach-loongson/loongson.h b/arch/mips/include/asm/mach-loongson/loongson.h
index 9bccdb5..a7fa66e 100644
--- a/arch/mips/include/asm/mach-loongson/loongson.h
+++ b/arch/mips/include/asm/mach-loongson/loongson.h
@@ -226,8 +226,12 @@ extern void mach_irq_dispatch(unsigned int pending);
#define LOONGSON_PCIMAP_WIN(WIN, ADDR) \
((((ADDR)>>26) & LOONGSON_PCIMAP_PCIMAP_LO0) << ((WIN)*6))
-/* Chip Config */
#ifdef CONFIG_CPU_SUPPORTS_CPUFREQ
+#include <linux/cpufreq.h>
+extern void loongson2_cpu_wait(void);
+extern struct cpufreq_frequency_table loongson2_clockmod_table[];
+
+/* Chip Config */
#define LOONGSON_CHIPCFG0 LOONGSON_REG(LOONGSON_REGBASE + 0x80)
#endif
OpenPOWER on IntegriCloud